Boiler.



Patented Mar. 27, |900. R. BOHNEN.

B D l L E R.

(Application med Nov. e, 1899.)

(No Model.)

In Uenor,

1 ohms PETERS 5D, Fumo-uvm, wmHmuToN o c NTTED STATES PATENT OEEICE.

RICHARD BOHNEN, OF CHICAGO, ILLINOIS.

BOILER.

SPECIFICATION forming part 0f Letters Patent N0. 645,935, dated. March 27', 1900.

Application filed November 6,1899. Serial No. 735,891. (No model.)

To all whom it may concern.-

Be it known that I, RICHARD BOHNEN, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Boilers, of which the following is a specification.

My invention relates to boilers, and has for its object to provide a new and improved boiler, of which the following is a description, reference being had to the accompanying drawings, wherein- Figure l is a longitudinal sectional view of a boiler embodying my invention. Fig. 2 is a section on line 2 2, Fig. I.

Like letters refer to like parts throughout both figures.

Referring now to the drawings, I have. shown my invention as embodied in a vertical boiller. This boiler is mounted upon a suitable support, and a combustion-chamber A is associated therewith. Two chambers B and C are provided, said chambers having suitable passage-ways B C', extending therethrough and being connected by a series of tubes disposed so as to form a central opening or passage-way D for the gases coming from the combustion-chamber. These tubes are preferably divided into two sets, the inner tubes E forming the upIiow-tubes and the outer tubes F forming the downiiowtubes. I provide an intermediate waterchamber G between the chambers B and C,di viding the tubes E into two sets, the upper tubes communicating with the chamber C and the chamber G and the lower tubes communicating with the chamberB and the chamber G. This intermediate chamber is provided With a central opening G' for the gases coming from the combustion-chamber. The outer or downlow tubes F are not connected with the central chamber, but communicate at one end with the chamber B and at the other end with the chamber C. This chamber may be termed a steamrchamberf7 as the steam generated 4by the boiler is contained therein. A wall H is interposed between the tubes E and the tubes F; This wall may be of any desired material which will not be inj ured by the heat from the hot gases {iowing through the passage-ways and between the tubes. The passage-way D is provided with ports D3, mounted, respectively, upon the chamber B and the chamber Gr. By using the two deectors and the intermediate chamber I deflect the heated gases in such a way as to abstract the greatest amount of heat therefrom, and thereby greatly increase the efticiency of the boiler. These heated gases coming from the combustion-chamber pass through the passage-way B until theystrike the deliector D. The heated gases are'then deliected at substantially right angles to the tubes E, so as to strike said tubes. The gases then pass up until they strike the bottom of the intermediate chamber Cr, when they are again deflected at substantially right angles to the tubes E, and then pass through the opening G. They then strike the deflector D2 and are again deflected at right angles against the tubes E. The gases then pass along the tubesv until they reach the bottom of the chamber C, where they are again deiiected inwardly and pass out through the passage-way C'. By placing the tubes F outside of the wall H these outer or downfiow tubes are not `subjected to the extreme heat, and

than the tubes E. By this means if it is necessary to remove any of the tubes E they can be passed into the chamber C or B and removed through the manholes I. If no intermediate chamber were provided and the tubes E extended from the chamber B to the chamber C, it would be necessary to provide some special arrangement for removing the tubes and inserting new tubes--such, for eX-' ample, as making holes in the roof-so that the tubes could be removed through them. My construction avoids all these difficulties and permits the tubes to be easily changed. It will thus be seen that I have here a construction which has numerous advantages in the matter of efliciency and adaptability and con; venience.

I have shown the downtiow-tubes and the IOO upilow-tubes as bearing a certain relation; but it is of course evident that this relation may be changed or varied to meet the conditions presented.

I have described in detail one construction embodying my invention; but it is of course evident that the construction may be varied in many particulars without departing from the spirit of my invention, and I therefore do not limit myself to the construction shown.

IVhen the intermediate chamber is omitted, it is also necessaryto provide the upper chamber C with a series of hand-holes opposite the tubes, so that the tubes maybe passed therethrough in order to remove or replace them. This construction, of course, is unnecessary when my boiler is used.

I claiml. A vertical water-tube boiler, comprising an upper and alower chamber, each provided with a passage-way for the heating-gases, a series of uplow-tubes connecting said chambers and disposed about a central passageway, a series of downflow-tubes connecting said chambers and a wall of heat-resisting material interposed between the two sets of tubes.

2. A vertical water-tube boiler, comprising an upper steam-chamber and a lower chamber,an intermediate chamber,all of said chambers provided with passage-ways for the heating-gases, a series of uplow-tubes connecting the upper and lower chambers with the intermediate chamber, said tubes arranged so as to form a passage-way for the heating-gases, and a series of outer down flow-tubes connecting the upper and lower chambers.

3. A Vertical water-tube boiler, comprising an upper and a lower chamber, an intermediate water-chamber, all of said chambers provided with passage-ways for the heatinggases, a series of uptlow-tubes connecting the upper and lower chambers with the intermediate water-chamber, said tubes arranged so as to form a passage-way for thc heatinggases, two heat-deflectors located in the passage-way formed by said uplow-tubes, one located on each side of the intermediate chamber, and a series of outer downtlow-tubes connecting the upper and lower chambers.

4. A vertical water-tube boiler, comprising an upper and a lower chamber, an intermediate water-chamber, all of said chambers provided with passageways for the heatinggases, a series of uptlow-tubes connecting the upper and lower chambers with the intermediate water-chamber, said tubes arranged so as to form a passage-way for the heating-gases,

.two heat-deilectors located in the passageway formed by said upflow-tubes, one located on each side of the intermediate chamber, a series of outer downfiow-tubes connecting the upper and lower chambers, and a wallinterposed between the two sets of tubes so as to protect the doWnilow-tubes from the heatinggases.

5. Avertical water-tube boiler, comprising an upper steam-chamber, a lower chamber and an intcrmediate chamber, the three chambers being separate from each other and provided with passage ways for the heatinggases, a series of upow-tubes connecting the upper and lower chambers with the intermediate chamber, the tubes above the intermediate chamber being substantially equal in length to the height of the steam-chamber, and a series of outer downfiowtubes,' by means of which the upper and lower chambers are connected.

RICHARD BOHNEN. Tit-nesses:

DONALD M. CARTER., HOMER L. KRAFT. 

